CN103033057B - A kind of burner refractory lining body for cement kiln is prefabricated builds block and production method and application thereof - Google Patents

A kind of burner refractory lining body for cement kiln is prefabricated builds block and production method and application thereof Download PDF

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CN103033057B
CN103033057B CN201210356204.XA CN201210356204A CN103033057B CN 103033057 B CN103033057 B CN 103033057B CN 201210356204 A CN201210356204 A CN 201210356204A CN 103033057 B CN103033057 B CN 103033057B
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block
building
burner
hours
prefabricated
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CN103033057A (en
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李艳
毛恩亮
赵炳南
曾鲁举
白雪松
张金龙
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RUITAI TECHNOLOGY Co.,Ltd.
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RUITAI TECHNOLOGY Co Ltd
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Abstract

The present invention relates to and a kind of prefabricatedly build block, by building block 1, annular boss 2, annular groove 3 form, and described annular boss 2 and annular groove 3 grafting can coincide and be connected.Its production method be raw material is watered in a mold, through under 25 DEG C of environment temperatures and construction after the natural curing maintenance of 48 hours, again through under room temperature 25 DEG C of environment, heat up 5 hours with 25 DEG C/h heating rate after, insulation 16 hours, again with 25 DEG C/h heating rate heat up 10 hours, toast in the insulation shuttle kiln of 6 hours, make after the demoulding.Be close to burner appearance during use and spread high-temperature ceramic fibre blanket, again by the present invention's cover on the burner, the annular boss latter one being built block inserts previously to be built in the annular groove of block, and circumferential weld chamotte is filled, and connects by that analogy and makes burner outer cladding refractory lining body.When the present invention uses, easy construction is quick, and easy accessibility, Usage parameter control is good.

Description

A kind of burner refractory lining body for cement kiln is prefabricated builds block and production method and application thereof
Art
The invention belongs to application to refractory field, be used in that the one of cement industry privileged site is fire-resistant builds block, especially burner refractory material serves as a contrast body.
Background technology
Burner is as the main heating source of cement rotary kiln, its head has 1.5m length will stretch in kiln, bear the heat effect from flame and grog, also to be subject to the invasion and attack of dust entrained by Secondary Air blower fan simultaneously, therefore its refractory material lining body usually peels off due to high heat effect and washing away of dust-contained airflow, life-span is generally 3-6 month, does not mate with cement rotary kiln life cycle, stops separately kiln and overhauls and bring larger economic loss to cement production enterprise.
Current cement kiln combustion device refractory material lining body adopts castable refractory cast-in-site to form, technical process comprises weld anchor firmware, formwork, cast, maintenance, baking etc. has carried out the making of burner refractory lining body, but due to the ambient influnence made at the scene, be difficult to accomplish sufficient maintenance and baking, capabilities of refractory materials cannot reach designing requirement, and casting process optimum environment temperature is 5 DEG C ~ 25 DEG C, cross cold or overheated meeting and bring the non-sclerous of castable or the phenomenon such as too fast of hardening, because the environment of site operation is uncontrollable, therefore also have impact on the performance of capabilities of refractory materials, result in existing burner refractory lining body result of use undesirable, life-span is generally 3 ~ 5 months, even shorter.Burner service life, low reason was: the invasion and attack 1) being subject to clinker dust entrained by Secondary Air blower fan; 2) long-term work is at about 1400 DEG C, and its flame temperature is at 2000 DEG C, and the thermic load that refractory material is subject to is huge; 3) flame temperature is unstable, and variations in temperature is frequent, the temperature difference is large; 4) work in alkaline atmosphere for a long time.
Summary of the invention
The object of the invention is to that a kind of burner refractory lining body for cement kiln of design is prefabricated builds block and production method and application thereof, adopt the prefabricated mode of building block of castable refractory to reach and ensure that work progress is controlled, dismounting is convenient.Select the castable refractory of excellent fire retarding performance to provide lining body the prefabricated superior fire resistance building block, material, pre-manufactured product are combined with construction technology and solve the short problem of burner refractory lining body life time, when the present invention applies, easy construction is quick, and Usage parameter control is good.
The present invention proposes following solution:
1, adopt high wear resistant castable refractory as material
Previously, the Chinese invention patent application 200610166441.4 that inventor proposes discloses a kind of super intensified abrasion-proof pouring material.The bulk composition of this castable is Brown Alundum, carborundum, pure calcium aluminate cement, in addition multiple high-purity fine powder, Ultramicro-powder and high efficiency dispersion water reducer, resistance to alkaline agent, flexibilizer etc., goes out according to rational grating allotment.
First, Brown Alundum has hardness large (hardness 9), fusing point high (fusing point 2050 DEG C), stable chemical nature, to sour, that alkali has good repellence performance.Carborundum also has hardness large (hardness 9.5), fusing point high (decomposition temperature 3400 DEG C), though in hydrogen-oxygen acid also complete undissolved feature.So make the material of matrix skeleton with Brown Alundum, carborundum, contribute to making product obtain bulk density high, hot strength is large, is enough to the invasion and attack of resisting clinker dust entrained by Secondary Air blower fan.
Secondly, while improving matrix skeleton, carefully adjust again matrix in conjunction with phase.The quality raw materials fine powder sintered with abundant electric smelting and Ultramicro-powder, cement, additive are combined into matrix by certain appropriate proportioning, thus ensure that it combines phase and at high temperature gives full play to connection, the effect of cementing aggregate, filling aggregate hole effectively, obtain the characteristics such as higher hot strength, thus improve the ability of refractory lining body opposing high temperature.
Adopt in-situ synthesized reaction technology, mullite phase is generated at matrix of materials partial reaction under high temperature, can either decompose by hydrated product at high operating temperatures like this, when cement bond strength is lost, form Ceramic bond, improve the high temperature hot strength of material, materials microstructure structure can be improved again, mineral composition, improves the heat-resistant knocking stability of material, thus can resist peeling off of frequently causing due to variations in temperature.
2, adopt prefabricated building body structure, meet rapid construction and the replacing of burner refractory lining body.Namely adopt that cylindrical shape is fire-resistant builds block, front and back building body unit is coordinated by emboss pit and splices.Without the need to cast-in-site, without the need to weld anchor firmware, quick, excellent performance is installed, to construction environment not requirement.Strong for aforesaid superelevation castable is cast in ganoid steel mold, through abundant maintenance, the kilning of contracting formula and bakes, formed after the demoulding and fire-resistantly build part.Building body construction unit parameter is: construction unit length L1=300 ~ 400mm, fire-resistant building body thickness is 80 ~ 100mm, external diameter is D1=610mm ~ 800mm, internal diameter D2=450mm ~ 600mm, cellular construction front end boss height is 20 ~ 30mm, width is 20 ~ 30mm, and rearmost flute height is the same with front end boss height, and width is 22 ~ 32mm.High-temperature ceramic fibre blanket is spread being close to burner one deck during construction, thickness is 2mm, then by building body construction unit cover on the burner, the boss of a rear building body construction unit is inserted in the groove of previous building body construction unit, the circumferential weld chamotte of middle about 2mm is filled, two building bodies linked together, by that analogy, building body is connected one by one makes burner refractory lining body.Be pointed out that first building body does not have boss, last lining body does not have groove, and last building body length is determined according to burner actual size.
Due to, have employed the fire resistance that wear-resistant castable significantly improves burner lining body, adopt the prefabricated mode of castable refractory to ensure that performance and the Fast Installation of refractory lining body, therefore solve short problem in burner refractory lining body service life.
Accompanying drawing explanation
Accompanying drawing 1 builds block structure schematic diagram for burner refractory lining body of the present invention
Accompanying drawing 2 is the left diagram of accompanying drawing 1
Accompanying drawing 3 is the coated application schematic diagram on the burner of connection that burner refractory lining body builds block
As shown in accompanying drawing 1 and accompanying drawing 2, the prefabricated block of building of burner refractory lining body of the present invention is made up of super intensified abrasion-proof pouring material, the prefabricated block of building of described burner refractory lining body is cylindrical shape, by building block 1, annular boss 2, annular groove 3 is formed, wherein annular boss 2 is building the front end of block 1, annular groove 3 is building the rear end of block 1, described annular boss 2 and annular groove 3 can coincide in grafting, wherein above-mentioned super intensified abrasion-proof pouring material is super intensified abrasion-proof pouring material disclosed in Chinese invention patent application 200610166441.4, D1 is the prefabricated external diameter building block of refractory lining body, D1=610mm ~ 800mm, D2 is the prefabricated internal diameter building block of refractory lining body, D2=450mm ~ 600mm, the height building block 1 front end annular boss 2 is 20 ~ 30mm, width is 20 ~ 30mm, the height building the annular groove 3 of block 1 rear end is 22 ~ 32mm, width is 20 ~ 30mmmm, the prefabricated length L1 building block of refractory lining body is 300 ~ 400mm, thickness L2 is 80 ~ 100mm.
As shown in Figure 3, when the present invention applies, refractory lining body builds the outside that block is coated on burner, and wherein D3 is the external diameter of burner, and 4 is high-temperature ceramic fibre blanket, and 5 is burner.
The production method that burner refractory lining body of the present invention builds block is: be cast in ganoid steel mold by strong for aforesaid superelevation castable, under the environment temperature of 25 DEG C and construction after the natural curing abundant maintenance of 48 hours, then under the environment through room temperature 25 DEG C, heat up 5 hours with 25 DEG C/h heating rate after, insulation 16 hours again with 25 DEG C/h heating rate heat up 10 hours, toast in the insulation shuttle kiln of 6 hours, form refractory lining body after the demoulding and build block.The construction unit parameter of building block is: construction unit length L1=300 ~ 400mm, thickness is 80 ~ 100mm, external diameter is D1=610mm ~ 800mm, internal diameter D2=450mm ~ 600mm, cellular construction front end boss height is 20 ~ 30mm, building block front end boss width is 20 ~ 30mm, and building block rearmost flute height is 22 ~ 32mm, and building block rearmost flute width is 20 ~ 30mmmm.
As shown in Figure 3, burner refractory lining body of the present invention is prefabricated, and being first close to burner appearance one deck at the construction field (site) spreads high-temperature ceramic fibre blanket when building block application, thickness is 2mm, then block cover is built on the burner by prefabricated for refractory lining body of the present invention, the boss latter one being built block structure unit inserts previously to be built in the groove of block structure unit, the circumferential weld chamotte of middle about 2mm is filled, block can be built by two to link together, build block by that analogy one by one and be connected and make the refractory lining body of burner outer cladding.Be pointed out that building block for first does not have boss, last builds block does not have groove, and last length of building block is determined according to burner actual size.
Detailed description of the invention
Embodiment:
Aforesaid wear-resistant castable is adopted to make building body.Burner D3=600mm, L=5715mm.Building body has 19 altogether, and be pointed out that burner head first building body unit does not have boss, last does not have groove.Front 18 construction unit parameters are: length L1=300mm, and fire-resistant building body thickness is 80mm, and external diameter is D1=760mm, internal diameter D2=600mm, cellular construction front end boss height 20mm, width 20mm, and rearmost flute height 22mm adds rearmost flute width 20mm.19th construction unit parameter is except length L1=315mm, all identical with front 18 parameters.High-temperature ceramic fibre blanket is spread being close to burner one deck during construction, thickness is 2mm, tie up with iron wire, then by each construction unit cover on the burner, the boss of a rear construction unit inserts in the groove of previous construction unit, linked together by 19 building body unit, central slot sections chamotte is filled.Above-mentioned design is after the burner application of certain 5000T/D cement rotary kiln, and burner life was increased to 10 months from 4 months.Any unusual condition is there is not in using.When building body wearing and tearing, the quantity according to breakage directly changes construction unit, easy for installation and save time.Facts have proved and select super intensified abrasion-proof pouring material, and prefabricated building body structure, the problem making burner service life short is satisfactorily resolved.

Claims (2)

1. the burner refractory lining body for cement kiln is prefabricated builds block, the described prefabricated block of building of burner refractory lining body is made up of super intensified abrasion-proof pouring material, described super intensified abrasion-proof pouring material formula, its constituent mass percentage is: granularity is 5-3mm or/and 3-1mm and Al 2o 3the carborundum 7-20% of corundum 50-70%, SiC of>=92%>=95%, cross 180 mesh sieves and Al 2o 3schmigel 8-12%, Al of>=92% 2o 3the calcined bauxite in powder 6-10% of>=88%, ultrafine silica powder 4-7%, pure calcium aluminate cement 5-8%, additional stainless steel fibre 1-3%, explosion-proof fiber 0.05-0.15%, water reducer accounts for 0.1-0.2%, the described prefabricated feature of building block of burner refractory lining body is: prefabricated block of building is cylindrical shape, by building block 1, annular boss 2, annular groove 3 is formed, wherein annular boss 2 is building the front end of block 1, annular groove 3 is building the rear end of block 1, described annular boss 2 and annular groove 3 can coincide in grafting, the described external diameter building block 1 is 610mm ~ 800mm, internal diameter is 450mm ~ 600mm, the height of annular boss 2 is 20 ~ 30mm, width is 20 ~ 30mm, the height of annular groove 3 is 22 ~ 32mm, width is 20 ~ 30mm, the length L1 building block 1 is 300 ~ 400mm, thickness L2 is 80 ~ 100mm.
2. produce the prefabricated method of building block of burner refractory lining body described in claim 1 for one kind, it is characterized in that: strong for aforesaid super-high wear-resistant castable is cast in after in ganoid steel die, under being placed on the environment temperature of 25 DEG C, cover band mould with the gunnysack of humidity or wet cloth and build block surface, maintenance 48 hours, then be placed in shuttle kiln and toast, temperature increasing schedule is as follows: heat up 5 hours with 25 DEG C/h heating rate, then constant temperature is incubated 16 hours, heat up 10 hours with 25 DEG C/h heating rate again, constant temperature is incubated 6 hours, form after the demoulding that refractory lining body is prefabricated builds block.
CN201210356204.XA 2012-09-24 2012-09-24 A kind of burner refractory lining body for cement kiln is prefabricated builds block and production method and application thereof Active CN103033057B (en)

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CN104235871A (en) * 2014-09-03 2014-12-24 无锡雪桃集团有限公司 Combustion chamber

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3486533A (en) * 1966-03-18 1969-12-30 Rust Furnace Co Pipe insulation jacket
GB1575602A (en) * 1977-01-13 1980-09-24 Didier Werke Ag Refractory structures for outlet valves for metallurgical vessels
GB2236778A (en) * 1989-10-10 1991-04-17 Radex Heraklith Keystone set
US5160256A (en) * 1991-07-19 1992-11-03 Robertshaw Controls Company Burner construction, igniter assembly therefor and methods of making the same
CN2807178Y (en) * 2005-07-25 2006-08-16 邯郸钢铁股份有限公司 Combined casing brick for burner of gas-burnt lime shaft kiln
CN1994958A (en) * 2006-12-19 2007-07-11 安徽省宁国市耐火材料有限责任公司 Super intensified abrasion-proof pouring material
DE202008007506U1 (en) * 2008-06-04 2009-10-08 Refratechnik Holding Gmbh Fireproof outer lining for a burner lance
CN201945169U (en) * 2011-01-17 2011-08-24 天津市亿博制钢有限公司 Burning nozzle brick shell and burning nozzle brick thereof
CN202109762U (en) * 2011-06-08 2012-01-11 河南省豫兴热风炉工程技术有限公司 Combined brick for burner nozzle
CN102503472A (en) * 2011-10-26 2012-06-20 河南省耕生耐火材料有限公司 SiC (silicon carbide)-toughened corundum prefabricated part by means of in-situ formation and preparation method for same

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3486533A (en) * 1966-03-18 1969-12-30 Rust Furnace Co Pipe insulation jacket
GB1575602A (en) * 1977-01-13 1980-09-24 Didier Werke Ag Refractory structures for outlet valves for metallurgical vessels
GB2236778A (en) * 1989-10-10 1991-04-17 Radex Heraklith Keystone set
US5160256A (en) * 1991-07-19 1992-11-03 Robertshaw Controls Company Burner construction, igniter assembly therefor and methods of making the same
CN2807178Y (en) * 2005-07-25 2006-08-16 邯郸钢铁股份有限公司 Combined casing brick for burner of gas-burnt lime shaft kiln
CN1994958A (en) * 2006-12-19 2007-07-11 安徽省宁国市耐火材料有限责任公司 Super intensified abrasion-proof pouring material
DE202008007506U1 (en) * 2008-06-04 2009-10-08 Refratechnik Holding Gmbh Fireproof outer lining for a burner lance
CN201945169U (en) * 2011-01-17 2011-08-24 天津市亿博制钢有限公司 Burning nozzle brick shell and burning nozzle brick thereof
CN202109762U (en) * 2011-06-08 2012-01-11 河南省豫兴热风炉工程技术有限公司 Combined brick for burner nozzle
CN102503472A (en) * 2011-10-26 2012-06-20 河南省耕生耐火材料有限公司 SiC (silicon carbide)-toughened corundum prefabricated part by means of in-situ formation and preparation method for same

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Application publication date: 20130410

Assignee: Zaozhuang Gai Ze stove Engineering Co., Ltd

Assignor: Ruitai Technology Co., Ltd.

Contract record no.: 2016990000370

Denomination of invention: Combustor refractory lining prefabricated building block for cement kiln, production method and application of combustor refractory lining prefabricated building block

Granted publication date: 20160120

License type: Exclusive License

Record date: 20160902

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Effective date of registration: 20190702

Address after: 277500 Residence of Jiehe Town, Tengzhou City, Zaozhuang City, Shandong Province

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Patentee before: Shandong Ruitai Gezer Engineering Co.,Ltd.